Question 103333
Let x=the length of the first film
    y=the length of the second film

(1){{{x=2*y-3}}}
(2){{{x+y=132}}}
Sltn.:

substituting (1) to (2), we have,

{{{(2*y-3)+y=132}}}
____{{{3*y-3=132}}}
______{{{3*y=135}}}
________{{{y=45}}}

Substituting this value to (1),

{{{x=2*45-3}}}
{{{x=87}}}

Therefore, the first film took 87 minutes to finish.